Lenze i55AE155F User Manual

9.8.6 Funcon codes
The mode of access to inverter data (parameters) is controlled via funcon codes.
Frame structure
Modbus Applicaon Header (MBAP) Protocol Data Unit (PDU) CRC
Transacon
number
Protocol charac-
ters
(always 0x0000)
Number of the
bytes sll to fol-
low
Slave address Funcon code Data / error code Checksum
2 bytes
2 bytes 2 bytes
1 byte 1 byte n byte 2 bytes
Tab. 1: ADU (Applicaon Data Unit)
Communicaon is established on the basis of the master/slave mode. Communicaon is
always started by a master request.
The inverter (slave) then either gives a valid response or outputs an error code (provided that
the request has been received and evaluated as valid message).
In case of a valid answer, the funcon code is returned. In the event of an error, a funcon
code assigned to the request is returned.
Error causes can be invalid CRC checksums, non-supported funcon codes or impermissible
data accesses.
Elements of the ADU:
•
MBAP (7 bytes)
•
Number of the bytes sll to follow in the message.
•
Address of the inverter Basic sengs ^ 349.
•
The other bytes of the header are not described here.
•
Funcon code
•
The funcon codes exclusively refer to "4X registers", i. e. registers from the address
4000.
•
All data in the inverter can only be accessed via these 4X registers, see Data mapping
^ 360.
•
The 4xxxx reference is implicit, i. e. given by the funcon code used. In the frame there-
fore the leading 4 is omied in the addressing process.
•
Lenze supports the basic 1 addressing of Modbus, i.e. the numbering of the registers
starts with 1 whereas addressing starts with 0. For example, the address 0 is used in
the frame when register 40001 is read.
•
Data or error code
•
Checksum
All ADU contents are represented in the Big Endian format (most signicant byte rst).
Funcon codes
Funcon code Funcon code in the event of an
error
Supported error codes
0x03 0x83 0x01, 0x02, 0x03, 0x04
0x06 0x86 0x01, 0x02, 0x03, 0x04
0x10 0x90 0x01, 0x02, 0x03, 0x04
0x17 0x97 0x01, 0x02, 0x03, 0x04
Funcon code Funcon name Info
3 0x03 Read Holding Registers Reading of a single register or a group of several interconnected regis-
ters.
6 0x06 Preset Single Register Wring of a single register.
16 0x10 Preset Mulple Registers Wring of a single register or a group of several interconnected registers.
23 0x17 Read/Write 4X Registers Reading and wring within a transacon:
•
Wring of a data block into a group of several interconnected regis-
ters.
•
Reading from a block of interconnected registers.
Conguring the network
Modbus TCP
Funcon codes
355

Lenze i55AE155F Specifications

General

Brand	Lenze
Model	i55AE155F
Category	Inverter
Language	English